NIKE has engineered knit for performance to create running footwear that features only the essentials. Employing a new technology called Nike Flyknit, yarns and fabric variations are precisely engineered only where they are needed for a featherweight, formfitting and virtually seamless upper. The Nike Flyknit Racer is the marathon shoe that the world’s best runners from all over the world, including those from Kenya, Great Britain, Russia and the US will wear in this spring’s marathons and in London this summer.